Surdacki M, Wick B
College of Optometry, University of Houston, Texas.
Optom Vis Sci. 1991 Apr;68(4):261-9. doi: 10.1097/00006324-199104000-00002.
Occasionally in patients who have symptoms suggestive of a vertical heterophoria no deviation is found, even on careful examination. Six days of occlusion have been recommended for uncovering such "latent" vertical deviations. We investigated prolonged monocular occlusion (Part I) and found that vertical deviations of varying amounts manifested on symptomatic and asymptomatic subjects. Thus, results of prolonged occlusion can be difficult to interpret. Nonadaptive vertical vergence systems have been implicated in development of symptoms. Therefore, it may be that diagnostic monocular occlusion is not appropriate unless patients have symptoms of vertical imbalance. We used (24 h) occlusion and associated phoria measurements (Part II) to determine vertical prism prescriptions which eliminated symptoms of seven symptomatic patients who did not show significant vertical heterophoria on routine clinical testing. We present data and case reports which elucidate the efficacy of this procedure.
偶尔，在有垂直隐斜视症状提示的患者中，即使经过仔细检查也未发现斜视。有人建议进行六天的遮盖以发现这种“潜在”的垂直斜视。我们研究了长时间单眼遮盖（第一部分），发现有症状和无症状的受试者都出现了不同程度的垂直斜视。因此，长时间遮盖的结果可能难以解释。非适应性垂直融合系统与症状的产生有关。所以，除非患者有垂直不平衡的症状，否则诊断性单眼遮盖可能不合适。我们使用（24小时）遮盖及相关隐斜测量（第二部分）来确定垂直棱镜处方，以消除七名在常规临床检查中未显示明显垂直隐斜视的有症状患者的症状。我们展示了阐明该程序有效性的数据和病例报告。
